Brake-shoe.



C. W. ARIVIBRUST. BRAKE SHOE.

APPLICATION FILED MAY 19, I916.

Patented Feb. 6, 1917.

on see arnrrr claw- CHARLES W. AB'MBRUST, OF CHICAGO, ILLINOIS, ASSIGNOR, BY IVJIESNE ASSIGNMENTS,

TO THE AMERICAN BRAKE SHOE 8: FOUNDRY COMPANY, OF WILMINGTON, DELA- WARE, A. CORPORATION OF DELAWARE.

BRAKE-SHOE Specification of Letters Patent.

Original application filed February 19, 1916, Serial No. 79,236. Divided and this application filed May 19,

" 1916. Serial No. 98,540.,

To all whom it may concern:

Be it known that 1, CHARLES W. ARM- BRUST, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Brake-Shoes, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to brake shoes and has for its object the provision of an improved brake shoe structure having reference particularly to the so-called back plate to which the brake shoe proper is secured.

This application is a division of my prior application Serial No. 7 9,236, filed Feb. 19, 1916.

My invention contemplates in its preferred form the construction of a back for a brake shoe by forming a key lug from metal drawn transversely from the metal of the back, the blank for the back having at that portion thereof where the lug is to be drawn from, a protruding tongue which forms part of the key lug when drawn into position.

I will explain one form which my invention may take more in detail by referring to the accompanying drawing illustrating the same, in wh1ch Figure 1 is a longitudlnal sectional view of a brake shoe constructed in accordance with my invention;

Fig. 2 is a top view of a blank from which the back of the shoe is made;

Fig. 8 is a sectional view on line card of Fig. 1, and

Fig. l is a perspective view of a completely formed back.

My improved back consists of a body portion 1 which is adapted to be secured to the brake shoe 2 as more clearly shown in Fig. 1. The brake shoe 2 has a holding lug 3 which partly incloses the lug 4 of the back 1. Thls lug 4. is constructed of a tongue 5 drawn transversely out of the body of the metal, as shown more clearly in Fig. 2, which tongue however includes a protruding extension 6 which forms part of the ordinary blank.

The back plate is provided with holes 7, 7 through which the metal of the back flows to more thoroughly hold the parts together. Holes 8, 8 are likewise provided to permit the metal of the shoe to more thoroughly unite the back and shoe proper together. The lug is then formed by being bent at four places, as more clearly apparent from Fig. 3, thus in conjunction with the metal of the back to form the key lug 4. The protruding tongue portion 6 remains in the plane of the body portion and thus practically provides a continuous body strip as more clearly apparent from Fig. i.

From what has been described the nature of my invention will be readily clear to those skilled in the art. Having however thus described one form which my invention may take, what I claim as new and desire to secure by Letters Patent is:

1. A back for a brake shoe consisting of a body strip provided with a key lug whose three sides are formed of a sidewise tongue drawn from said body strip transversely without bending the remaining portions of the said body strip.

2. A back for a brake shoe consisting of a body strip provided with a holding lug formed of a sidewise tongue drawn from said body strip transversely, and having its free end fastened to the shoe body.

8. A back for a brake shoe consisting of a body strip provided with a continuous key lug whose three sides are formed of a sidewise tongue drawn from said body strip transversely and having means for its formed sides to be fastened to the metal of the shoe.

4. A back for a brake shoe consisting of a body strip provided with a holding lug consisting of a continuous strip of metal formed of a sidewise tongue drawn from said body strip transversely to form the three sides of said lug, thereby forming means for fastening the said body strip to the shoe body underneath the said holding lug.

5. A back for a brake shoe consisting of a body strip provided with a key lug formed by a tongue drawn transversely from said body strip and from a protruding portion thereof, which protruding portion is substantially the width of said body strip.

6. A back for a brake shoe provided with a key lug formed from a sidewise projecting tongue drawn'to form the three sides of said lug, said back being slotted at the base of sand tongue.

"Z. A'back for a brake shoe provided with a key lug formed from a sidewise projecting tongue drawn to form the three sides of said lu A back for a brake shoe having a trans- Verse tongue pressed to form the three sides of a holding lug for said back.

9. A brake shoe consisting of a body plate and a shoe body, said shoe being provided with a holding lug stamped from a transverse tongue from said plate to 'form the three sides of said lug.

10. A back 'for a brake shoe having a 15 transverse tongue stamped to form the three sides of a' holding lug foi'said beck.

In ,WitIlGSS whereof, I hereunto subscribe my name this 12th day of May, A. D. 1916.

CHARLES W. ARMBRU ST.

Witnesses:

HAZEL A. J ONES, MAX W. ZABEL.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner oi. Patents,

7 Washington, D C. 

